公开(公告)号：US20240290944A1

公开(公告)日：2024-08-29

申请号：US18648388

申请日：2024-04-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Miaomiao Dong ,  Changfeng Bie ,  Shaocong Ouyang ,  Huan Ni ,  Hongyu Liu ,  Xin Sun ,  Chenghua Fu

IPC: H01M4/136 ,  H01M4/02 ,  H01M4/58 ,  H01M4/62 ,  H01M50/204 ,  H01M50/244

CPC classification number: H01M4/136 ,  H01M4/5825 ,  H01M4/62 ,  H01M50/204 ,  H01M50/244 ,  H01M2004/028

Abstract: Provided is a battery pack. The battery pack includes a first battery cell, a second battery cell, and a third battery cell. A positive electrode active substance of each battery cell is composed of lithium iron phosphate and a low-temperature additive. The low-temperature additive is selected from compounds containing at least two carbonyl groups, which are conjugated with an unsaturated structure or an atom having lone-pair electrons connected with the carbonyl groups. At a temperature lower than or equal to 10° C., a ratio of a discharging capacity of a single cell of the second battery cell to a discharging capacity of a single cell of the first battery cell ranges from 1.003 to 1.12, and a ratio of a discharging capacity of a single cell of the third battery cell to a discharging capacity of a single cell of the second battery cell ranges from 1.005 to 1.15.

公开(公告)号：US11121362B2

公开(公告)日：2021-09-14

申请号：US17123544

申请日：2020-12-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xue Leng ,  Rui Du ,  Na Liu ,  Yongchao Liu ,  Huan Ni

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/1315 ,  H01M4/505 ,  H01M4/525 ,  C30B29/22 ,  H01M4/02

Abstract: The present application provides a positive electrode sheet for a secondary battery, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer on a surface of the positive electrode current collector, the positive electrode active material layer includes a positive electrode active material, the positive electrode active material includes a first lithium nickel transition metal oxide and a second lithium nickel transition metal oxide, the first lithium nickel transition metal oxide includes a first substrate and a first coating layer on a surface of the first substrate, the first substrate is secondary particles, and the second lithium nickel transition metal oxide is a single crystal or single-crystal-like morphological particles.

公开(公告)号：US12095051B2

公开(公告)日：2024-09-17

申请号：US18384675

申请日：2023-10-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Miaomiao Dong ,  Shaocong Ouyang ,  Huan Ni ,  Hongyu Liu ,  Changfeng Bie ,  Xin Sun ,  Chenghua Fu

IPC: H01M10/44 ,  H01M4/02 ,  H01M4/136 ,  H01M4/36 ,  H01M4/58 ,  H01M4/60 ,  H01M10/0525 ,  H01M10/42 ,  H01M50/249

CPC classification number: H01M10/443 ,  H01M4/136 ,  H01M4/364 ,  H01M4/5825 ,  H01M4/60 ,  H01M10/0525 ,  H01M10/4235 ,  H01M10/441 ,  H01M50/249 ,  H01M2004/028

Abstract: A battery pack includes a first battery cell, a second battery cell, and a third battery cell. A positive electrode active substance of each battery cell is composed of lithium iron phosphate and a low-temperature additive. The low-temperature additive is selected from compounds containing at least two carbonyl groups, which are conjugated with an unsaturated structure or an atom having lone-pair electrons connected with the carbonyl groups, and a discharging cut-off voltage of the battery pack at a low temperature has the following rules: discharging cut-off voltages V1, V2, and V3 of the first battery cell, second battery cell, and third battery cell range from 1.95V to 2.1V, from 1.8 V to 2.0V, from 1.6V to 1.9V, respectively, and V1, V2, and V3 satisfy a relationship of V1>V2>V3.

公开(公告)号：US20230223523A1

公开(公告)日：2023-07-13

申请号：US18187718

申请日：2023-03-22

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xue Leng ,  Rui Du ,  Na Liu ,  Yongchao Liu ,  Huan Ni

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131

CPC classification number: H01M4/366 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M2004/028

Abstract: A positive electrode plate for secondary battery, a secondary battery, a battery module, a battery pack, and an apparatus are provided. Some embodiments provide a positive electrode plate for secondary battery, where the positive electrode plate includes a positive electrode current collector and a positive electrode active substance layer located on a surface of the positive electrode current collector, the positive electrode active substance layer includes a positive electrode active substance, the positive electrode active substance contains a first lithium-nickel transition metal oxide and a second lithium-nickel transition metal oxide, the first lithium-nickel transition metal oxide contains a first matrix and a first coating layer located on a surface of the first matrix, the first matrix is secondary particles, and the second lithium-nickel transition metal oxide is single crystal particles or particles with quasi-single crystal morphology.

公开(公告)号：US10784508B2

公开(公告)日：2020-09-22

申请号：US15976713

申请日：2018-05-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huan Ni ,  Yujun Chen ,  Xinliang Kuang ,  Xuguang Gao ,  Long Wang ,  Na Liu

IPC: H01M4/36 ,  C01B25/36 ,  C01G53/00 ,  H01M4/62 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/052 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/131 ,  H01M4/02

Abstract: The present disclosure provides a preparation method of a modified positive electrode active material preparation method, which comprising steps of: dispersing a positive electrode active material matrix into an alcohol solvent to form a positive electrode active material matrix suspension; dissolving an alcohol-soluble aluminum salt in an alcohol solvent to form an alcohol-soluble aluminum salt solution; dissolving an alcohol-soluble phosphorous compound in an alcohol solvent to form an alcohol-soluble phosphorous compound solution; mixing the alcohol-soluble aluminum salt solution and the alcohol-soluble phosphorous compound solution and heating to react, obtaining a liquid-phase coating solution which contains aluminum phosphate after the reaction is finished; mixing and stirring the positive electrode active material matrix suspension and the liquid-phase coating solution which contains aluminum phosphate, extraction filtrating and obtaining a filter cake after the stirring is finished, then drying and baking the filter cake, finally obtaining a modified positive electrode active material.

公开(公告)号：US20240387819A1

公开(公告)日：2024-11-21

申请号：US18786584

申请日：2024-07-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qiang Chen ,  Qi Wu ,  Huan Ni ,  Chongheng Shen ,  Shuxing Huan ,  Dong Zhao ,  Jingpeng Fan ,  Jing Wang ,  Na Liu

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/505

Abstract: The present application provides a positive electrode active material and a preparation method thereof. The positive electrode active material of the present application has high compaction density, improved structural stability, high filling degree among particles, good dispersibility, and good material processing performance, which can effectively improve the energy density of a battery, and improve the cycling performance and safety performance of the battery. The present application further provides a secondary battery, a battery module, a battery pack, and an electrical device including the positive electrode active material.

公开(公告)号：US11108051B2

公开(公告)日：2021-08-31

申请号：US15968654

申请日：2018-05-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yujun Chen ,  Xinliang Kuang ,  Long Wang ,  Na Liu ,  Huan Ni

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/525 ,  B01J13/08 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/131 ,  H01M4/02

Abstract: The present disclosure provides a modified positive electrode active material. The modified positive electrode active material comprises a positive electrode active material inner core; a metal oxide layer comprising a metal oxide and coated on a surface of the positive electrode active material inner core; and a polymer layer comprising a polymer and coated on a surface of the metal oxide layer, the polymer being one or more selected from a group consisting of polyacrylic acid, polymethyl methacrylate, polyacrylamide and lithium polyacrylate. The modified positive electrode active material of the present disclosure has better structure stability and thermal stability, when the modified positive electrode active material is applied in the electrochemical energy storage device, cycle performance and safety performance of the electrochemical energy storage device can be significantly improved without decreasing energy density of the electrochemical energy storage device.